how are the group number and the number of valence electrons of a representative element related to each other

Question

pls answer it right away!!!!!

Answer 1

the number of electrons in the outermost shell of an atom of an element , that is the valence shell electrons determines the group under which the element is placed. since some atoms can have d same number of atoms in their outermost shell, it is only wise 2 place them under the same group. though the number of their electron shells vary.

Answer 2

The group number indicates the number of electrons on the outer shell. called valence shell. There can be ONlY 8 electrons in the valence shell (except for the shell K which is full with only 2 electrons)
In a stable molecule all the atoms must have either 0 either 8 electrons on the outer shell. So what arrives in a molecule.

If an atom has 4 or less of 4 electrons on the outer shell, he Will loose this electrons in order to have the shell empty; So, an atom of first group an electron on the outer shell will loose one electron. Its valence is one . for the second group he will loose two electrons its valence is 2

If an atom has 4 , 5, 6, 7, electrons on the outer shell it will take an electron to have 8 electrons on the outer shell. In the seventh group, with seven electron s it will take one electron .its valence is 1

Particular case An atom which has 8 electrons on the outer shell can not combine as this shell is full. Is inert and named noble gas

Atom with 4 electrons can either give the 4 electrons or capture four electrons. An example is C

Answer 3

in case you got here across a periodic table with the communities categorized through Roman numerals (or now and again Arabic numerals) and a letter A or B, then for all yet crew VIII (now and again VIIIB), the Fe, Ni, Co communities, the Roman numeral TELLS you the variety of valence electrons. not so with the recent IUPAC numbering device of one million-18. yet you may anticipate through subtracting 10 from the numbers 11-18. back, the gang numbers for the Fe, Ni and Co communities inform you not some thing. =========== follow up ============ UMB is off the chart somewhat. The inert gases, that are modern-day in crew VIIIA, DO certainly have valence electrons, and they have 8 of them, only because the Roman numeral tells you. The 8 valence electrons are got here across contained in the s-sublevel and the filled p-sublevel for each inert gas, except He, for sure, which has a filled s-sublevel really.

Answer 4

They're the same. Noble gases, the most stable elements, are located in Group 8A and they have 8 valence electrons.